Spark plug and method for manufacturing same

A spark plug comprising:

• a metal body with a front end, a back end, a longitudinal direction, and a passage extending in the longitudinal direction;
• located in the passage is an insulator that contains a center electrode that projects out of the insulator in a region of the front end;
• in the region of the front end, the body has, located in the passage, a seal seat for the insulator, and in the region of its back end, the body has a retaining mechanism holding the insulator in the body in a positive manner, such that the insulator is configured to be pressed against the seal seat in the longitudinal direction with a preloading force in order to seal the passage against the flow of combustion gases;
• a positive-acting securing mechanism that at least partially overlaps the side of the retaining mechanism facing away from the front end is attached to the body, wherein a shoulder of the insulator projects beyond the side of the securing mechanism facing away from the front end, wherein the securing mechanism overlaps the retaining mechanism, forming a first gap with the retaining mechanism and forming a second gap with the insulator, wherein the securing mechanism contains a ring-shaped section that surrounds the insulator, forming the second gap, and overlaps the retaining mechanism, forming the first gap, and wherein an inner contour of the ring-shaped section is matched to an outer contour of the retaining mechanism, an outer contour of the insulator, or an outer contour of both the retaining mechanism and the insulator, wherein the second gap is at least partially located directly between a portion of the retaining mechanism that overlaps the shoulder of the insulator and a portion of the ring-shaped section that overlaps the shoulder of the insulator.